Boris Johnson was mocked over his "friends with benefits" funding during parliament's probe of the PM's involvement with an American tech entrepreneur.
The Prime Minister is facing questions over his relationship with Jennifer Arcuri after it was reported that the American who moved to London seven years ago, was given £126,000 in public money and was treated to privileged access to three foreign trade missions led by Mr Johnson.
The Government insist there is "no reason to think there is anything untoward" about the allocation of public money to a model turned technology entrepreneur.
Labour's Tulip Siddiq asked Culture minister Matt Warman to assure MPs that "there will no other examples of friends with benefits".
The London MP told the Commons: "The Times today revealed that the Prime Minister previously planned to set up a £100m fund with the owner of Hacker House.
"May I remind the House that as Mayor of London the Prime Minister oversaw the Garden Bridge Project which had allegations of corruption and was riddled with conflicts of interest.
"Will the minister reassure the House that there will no other examples of 'friends with benefits' funding from DCMS or any other department?"
Shadow culture secretary and Labour deputy leader Tom Watson said it was "very difficult" to see how the company fulfilled the criteria for the grants.
The broader questions, he argued, needed answering "because they keep coming back to the current Prime Minister", adding: "The issue of whether he has represented the interests of this company or other companies require scrutiny."
He added: "This is fundamentally a question of character and of suitability. Is the Prime Minister of sufficient character to occupy high office and disburse public funds, is he suitable?
"Does he understand that the trappings and privileges of power come with restrictions and restraints? Is he capable of restraining himself?
"The truth is that our Prime Minister does reckless things. He is a man whose character renders him unsuitable and unfit for the office he holds.
"I want answers to these questions but we all know the broader essential truth, we can all see who Boris Johnson is."
Mr Warman replied: "The Prime Minister has had no role whatsoever in this application."
Asking an urgent question Lib Dem MP Layla Moran said: "The fact that we are back in the Commons today is because the Prime Minister has been shown to ride rough-shod over the laws of this land.
"It would indeed be disappointing if we were to find that the prime minister has form in bending the rules for personal or political gain.
Mr Johnson has been given two weeks to explain his links with Ms Arcuri while he was mayor of London.
Greater London Authority oversight committee chairman Len Duvall has imposed the deadline on the PM to provide details and a timeline of his “personal, social and professional” contact with the American during his time as mayor.
It follows claims that while in the role between 2008 and 2016, Mr Johnson failed to declare a potential conflict of interest in relation to the US businesswoman.
Her company Innotech got £11,500 in sponsorship from the mayor’s promotional agency during this period.
And it is alleged Ms Arcuri received special treatment to attend three foreign trade missions with the then mayor in the space of a year.
